/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.examples.rubyeditor;

import org.eclipse.jface.text.DefaultIndentLineAutoEditStrategy;
import org.eclipse.jface.text.IAutoEditStrategy;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextDoubleClickStrategy;
import org.eclipse.jface.text.ITextHover;
import org.eclipse.jface.text.TextAttribute;
import org.eclipse.jface.text.contentassist.ContentAssistant;
import org.eclipse.jface.text.contentassist.IContentAssistant;
import org.eclipse.jface.text.presentation.IPresentationReconciler;
import org.eclipse.jface.text.presentation.PresentationReconciler;
import org.eclipse.jface.text.rules.BufferedRuleBasedScanner;
import org.eclipse.jface.text.rules.DefaultDamagerRepairer;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.source.IAnnotationHover;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.text.source.SourceViewerConfiguration;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.ui.examples.javaeditor.javadoc.JavaDocCompletionProcessor;
import org.eclipse.ui.examples.javaeditor.util.JavaColorProvider;

/**
 * Example configuration for an <code>SourceViewer</code> which shows Java
 * code.
 */
public class RubySourceViewerConfiguration extends SourceViewerConfiguration {

	/**
	 * Single token scanner.
	 */
	static class SingleTokenScanner extends BufferedRuleBasedScanner {
		public SingleTokenScanner(TextAttribute attribute) {
			setDefaultReturnToken(new Token(attribute));
		}
	}

	/**
	 * Default constructor.
	 */
	public RubySourceViewerConfiguration() {
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public IAnnotationHover getAnnotationHover(ISourceViewer sourceViewer) {
		return new RubyAnnotationHover();
	}

	/*
	 * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getAutoEditStrategies(org.eclipse.jface.text.source.ISourceViewer,
	 *      java.lang.String)
	 */
	public IAutoEditStrategy[] getAutoEditStrategies(
			ISourceViewer sourceViewer, String contentType) {
		IAutoEditStrategy strategy = (IDocument.DEFAULT_CONTENT_TYPE
				.equals(contentType) ? new RubyAutoIndentStrategy()
				: new DefaultIndentLineAutoEditStrategy());
		return new IAutoEditStrategy[] { strategy };
	}

	/*
	 * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getConfiguredDocumentPartitioning(org.eclipse.jface.text.source.ISourceViewer)
	 */
	public String getConfiguredDocumentPartitioning(ISourceViewer sourceViewer) {
		return RubyEditorExamplePlugin.RUBY_PARTITIONING;
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public String[] getConfiguredContentTypes(ISourceViewer sourceViewer) {
		return new String[] { IDocument.DEFAULT_CONTENT_TYPE,
				RubyPartitionScanner.JAVA_DOC,
				RubyPartitionScanner.JAVA_MULTILINE_COMMENT };
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {

		ContentAssistant assistant = new ContentAssistant();
		assistant
				.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));
		assistant.setContentAssistProcessor(new RubyCompletionProcessor(),
				IDocument.DEFAULT_CONTENT_TYPE);
		assistant.setContentAssistProcessor(new JavaDocCompletionProcessor(),
				RubyPartitionScanner.JAVA_DOC);

		assistant.enableAutoActivation(true);
		assistant.setAutoActivationDelay(500);
		assistant
				.setProposalPopupOrientation(IContentAssistant.PROPOSAL_OVERLAY);
		assistant
				.setContextInformationPopupOrientation(IContentAssistant.CONTEXT_INFO_ABOVE);
		assistant.setContextInformationPopupBackground(RubyEditorExamplePlugin
				.getDefault().getJavaColorProvider().getColor(
						new RGB(150, 150, 0)));

		return assistant;
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public String getDefaultPrefix(ISourceViewer sourceViewer,
			String contentType) {
		return (IDocument.DEFAULT_CONTENT_TYPE.equals(contentType) ? "//" : null); //$NON-NLS-1$
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public ITextDoubleClickStrategy getDoubleClickStrategy(
			ISourceViewer sourceViewer, String contentType) {
		return new RubyDoubleClickSelector();
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public String[] getIndentPrefixes(ISourceViewer sourceViewer,
			String contentType) {
		return new String[] { "\t", "    " }; //$NON-NLS-1$ //$NON-NLS-2$
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public IPresentationReconciler getPresentationReconciler(
			ISourceViewer sourceViewer) {

		JavaColorProvider provider = RubyEditorExamplePlugin.getDefault()
				.getJavaColorProvider();
		PresentationReconciler reconciler = new PresentationReconciler();
		reconciler
				.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer));

		DefaultDamagerRepairer dr = new DefaultDamagerRepairer(
				RubyEditorExamplePlugin.getDefault().getJavaCodeScanner());
		reconciler.setDamager(dr, IDocument.DEFAULT_CONTENT_TYPE);
		reconciler.setRepairer(dr, IDocument.DEFAULT_CONTENT_TYPE);

		dr = new DefaultDamagerRepairer(RubyEditorExamplePlugin.getDefault()
				.getJavaDocScanner());
		reconciler.setDamager(dr, RubyPartitionScanner.JAVA_DOC);
		reconciler.setRepairer(dr, RubyPartitionScanner.JAVA_DOC);

		dr = new DefaultDamagerRepairer(new SingleTokenScanner(
				new TextAttribute(provider
						.getColor(JavaColorProvider.MULTI_LINE_COMMENT))));
		reconciler.setDamager(dr, RubyPartitionScanner.JAVA_MULTILINE_COMMENT);
		reconciler.setRepairer(dr, RubyPartitionScanner.JAVA_MULTILINE_COMMENT);

		return reconciler;
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public int getTabWidth(ISourceViewer sourceViewer) {
		return 4;
	}

	/*
	 * (non-Javadoc) Method declared on SourceViewerConfiguration
	 */
	public ITextHover getTextHover(ISourceViewer sourceViewer,
			String contentType) {
		return new RubyTextHover();
	}
}
